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A map of the China Sea between Malaya, Sumatra and Borneo. The numbers indicate sea depth (bathymetry), and there are drawings of the side views of some of the islands (elevations), both used to aid navigation. Some maritime routes are also marked.

This mid-18th century map shows the island of Sumatra and the Malay Peninsula, divided by the Straits of Malacca. A note in French at the top right corner states that the interior of Sumatra and the course of its rivers are unknown.